Do you know what red flag is? It's something that we don't like in an relationship. Mine is being late. People always have too many excuses, but I think that's not the case. If people really think one meeting is important, they will definitely arrive in advance. Because they want to show their respectation, also arriving in advance will leave a good impression.
I had the experiences of waiting people for almost thirty minutes! That literally drove me crazy. They were always blaming the traffic jam or teacher's procrastination, but they never cared about the situation I was in. I was waiting at a bus station alone doing NOTHING but expecting them to text me.
Afterwards, most of the people will apologize. But to me, it was useless. Nothing will be changed, after saying sorry. Nobody will bring back the precious time to me.
For my view, time is priceless.